explicit call to destructor is not destroying my object why?

Question

I\'m calling the destructor to deallocate memory but it is not deleting my object. What is the reason behind it?

my code is like this:

class A
{
publ         


        

Answer 1

i m calling destructor to deallocate memory

Why? At language level destructor does not deallocate memory occupied by the object itself.

A non-trivial destructor ends object's lifetime, but it doesn't end the object's storage duration. This means that memory remains allocated, it just becomes "raw" (uninitialized). So, in that sense it is destroying your object.

Meanwhile, a trivial destructor has no effect at all. Even if you call it explicitly, the object's lifetime does not end.

In your case the destructor B::~B is non-trivial though, which formally means that by calling it you ended your object's lifetime. You destroyed it as much a local object can be destroyed. But the memory remains. Attempting to access that memory as a B object simply leads to undefined behavior.

In fact, there's no way to manually deallocate memory occupied by a local object. Local memory is always deallocated automatically.